71685797457 has 8 divisors (see below), whose sum is σ = 95591798784. Its totient is φ = 47785163888.

The previous prime is 71685797437. The next prime is 71685797473. The reversal of 71685797457 is 75479758617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71685797457 - 2²² = 71681603153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71685797437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310673 + ... + 1364270.

It is an arithmetic number, because the mean of its divisors is an integer number (11948974848).

Almost surely, 2^71685797457 is an apocalyptic number.

It is an amenable number.

71685797457 is a deficient number, since it is larger than the sum of its proper divisors (23906001327).

71685797457 is a wasteful number, since it uses less digits than its factorization.

71685797457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683879.

The product of its digits is 103723200, while the sum is 66.

The spelling of 71685797457 in words is "seventy-one billion, six hundred eighty-five million, seven hundred ninety-seven thousand, four hundred fifty-seven".